Main Features:● NEW LED back light displays charging / discharging / quick test / circuit more clearly in the dark● NEW refresh mode can show you batteries' capacity, letting you know real magnitude● NEW added quick test mode to test the battery impedance●Four working mode available at user's choice: Charge, Discharge, Test, Quick Test and Refresh● 4 independent charging slots charge rechargeable batteries of different types and sizes and with different capacities at the same time● Charging current can be selected to be 200mA, 300mA, 500mA, 700mA or 1000mA ( 1500mA and 2000mA can be applied when only slot 1 or 4 is selected ). Default discharging current is 500mA● Integrates the minus delta voltage ( -ΔV ) for NiCd or NiMh batteries charging termination, and for Li-ion batteries charging to 4.2V with pre-selected constant current. ( 3.7V Li-FeO4 and 4.35V high voltage batteries charging mode can be selected through switch on board )● Easy-to-read LCD with back light showing battery Voltage, Charge / Discharge Current, Charging Time, Battery Capacity, etc.● Includes overheat detection to protect rechargeable batteries and charger itself from overheating● Designed for AA ( LR6 ) and AAA ( LR3 ）NiCd, NiMH or 3.7V Li-ion rechargeable batteries in size type of 18650, 14500, 16340, 10440, also compatible with 10340, 18650, 26650, 26500 ( printed on the package ) and 17670, 18490, 17500, 17335 ( printed on the product ) ● Operating temperature: 0 - 40 deg.C● Max charging capacity: up to 20000mAh● Power adapter: DC 12V, 3.0A ( output ), 100 - 240V, 50 / 60Hz ( input )● Please NOTE: batteries are not included

Highlights:1. Voltage update rate is 30s instead of 60s.2. Charging voltage is regulated to 4.7V instead of 5.0V, thus loading on power adapter when batteries are flat is less. 5.0V charging voltage has problem in regulating the correct current level due to this over loading current on power adapter, which lead to Panasonic brand Li-ion batteries showed wrong charging capacity value ( + 25 percent ). With 4.7V charging voltage, the load on power adapter is greatly reduced and thus can make all types of batteries charged properly.3. 4.35V charging time can be very long because charging current is regulated in entering the CV stage at 4.12V, which is same as 4.2V type. Now 4.35V charging algorithm is changed to 4.27V.5. Better safety feature: PCB temperature was used to in controlling fan on / off only with 2.0V, now this function is enhanced so that temperature is monitored for entering thermal shutdown mode when excessive high temperature is reached. It is especially helpful when fan is not running and which can lead to plastic melt down happening.6. New fan cover provides better protection for cooling fan.7. Charging current range: 200mA, 300mA, 500mA, 700mA, 1000mA, 1500mA, 2000mA8. Discharge current range:200mA, 300mA, 500mA, 700mA, 1000mA ( Li-ion batteries only )9. Max. charging capacity: 20000mAh10. Voltage deviation: ＜ 0.03V @4.2V11. Current deviation: ＜ 5pct

This charger is an analyzing charger for LiIon and NiMH batteries, which means the charger can charge and discharge while measuring.

When the charger is turned on, it displays test where all the text can be seen. When startup is finished it is possible to select mode:

CHARGE: Charge battery with 200 to 1000 (2000) mA.

DISCHARGE: Discharge battery with 200 to 1000 mA.

DISCHARGE REFRESH: Discharge and charge the battery 3 times.

CHARGE TEST: Charge, discharge and charge the battery, show how much current was discharged.

QUICK TEST: Measure the internal resistance of the battery.

When display is flashing it is possible to select mode and current.Using the slot button it is possible to reselect a slot and change parameters for it, also when charger is working.When putting multiple batteries in the charger at the same time, it is possible to select mode and current simultaneous for all of them (Very nice).

When charging or discharging it is possible to use the DISPLAY button to select between V, mA and mAh.The display button can also be used when the charge/discharge is finished, but the charger will change back to FULL display rather quickly.

Here is an example where I have selected different functions for each slot.

Each time a button is pressed, the light turns on for a 20 seconds.The FULL and NULL message can also be seen.

The charger uses an external 12 volt power supply at 3A ( see later ).It has a fan, this is necessary to handle all four channels at full power. Even with only one channel in use the fan, it start and stop very often. The fan is not very loud, but due to the starting and stopping it is very annoying.

The charger uses the classical slider construction to handle most battery sizes. The slider works smoothly and can handle sizes from 32mm to 72.5mm.For measuring internal resistance the slider is not very good, it often has a high connection resistance.

A couple of different NiMH batteries in the charger.

And some LiIon batteries.

Using only slot 1 and 4, the maximum charge current is 2000mA.In all other cases the maximum charge current is 1000mA.The maximum discharge current is always 1000mA.

Charge currents: 200mA, 300mA, 500mA, 700mA, 1000mA, 1500mA, 2000mA

Discharge currents: 200mA, 300mA, 500mA, 700mA, 1000mA

The charger can easily handle 70mm long batteries.It is recommended to charge smaller batteries in the two center slots.The charger has an internal switch marked with 3.7V, 4.20V and 4.35V. I have not tested this switch, because it is internal, but it might be possible to charge other Li-ion chemistries.

We generally require between 3-7 business days to arrange shipment upon payment. The exact processing time varies depending on the item.Please refer to our shipping estimation below:A. Expedited Shipping: Around 3-7 business days to arrive.B. Standard Shipping: Between 7-10 business days to be delivered. C. Flat Rate Shipping: Between 10-25 business days to be received.For more shipping details http://www.gearbest.com/about/shipping-methods.html

We are pleased to inform it is available for purchase.Have a nice day.

Q

When it would be in stock?

By Alexey Romza Feb-24/2016 05:02:06

A

Hi ,

We are pleased to inform it is available for purchase.Have a nice day.

Q

есть ли в наличие?

By александр Dec-05/2015 01:12:04

A

Thank you for your inquiry.
It is available for purchase.
Thanks in advance for your order.
Have a nice day.

Q

Hello !
When do you plan to have it back in stock in EU warehouse ?

By Mihai Nov-16/2015 10:11:08

A

Hi Mihai,
We are sorry that we do not have the plan to sell this phone in the EU warehouse for the moment. Please pay attention to our website for the update. Please feel free to ask if you have further questions.

Q

Hello,
when will you restock this item in the EU warehouse?
It has been out of stock for some time now.
Thank you, João.

By João Machado Nov-12/2015 03:11:43

A

Hi João, I am sorry that this item is unavailable in EU stock for now. We can not sure when it will be available in EU stock. It depends on the customers' demand and the production of this item. We will try to replenish this item in EU as much as we can. Please kindly continually concern this item on our website. For now it is only available in China-Warehouse. Thank you for your understanding. Please feel free to ask further presale questions.

Q

Qu'il y ait une présence dans ce produit maintenant

By JCS Oct-16/2015 09:10:42

A

Hi JCS ,
We are delighted to inform you that the item is in stock and is available for purchase.

Q

Hi there, do you know if you will be restocking this charger?

By Andreas Oct-13/2015 03:10:14

A

Hi Andreas,
We are delighted to inform you that the item is in stock and is available for purchase.

Q

Hello! Will specify please. Whether there is in a presence this commodity now.
Thank you, with impatience I expect an answer from you!

By Ivan Oct-01/2015 10:10:36

A

Hi Ivan,
We are delighted to inform you that the item is in stock and is available for purchase.

Q

Hi! This item is available in stock? I want to pay but I fear a long wait.
Привет ! Этот пункт есть в наличии на складе? Я хочу оплатить но боюсь долгого ожидания.

By Val. Aug-22/2015 08:08:48

A

Hi Val.,
It is in stock and is available for purchase now. But there are a lot of customers placing order on our website, so it will be not in stock at any time. Thanks for your understanding!

Q

do you have the Opus BT-C3100 Charger in stock?

By Richard Jul-16/2015 05:07:55

A

Hi,Richard ! I am delighted to inform you that the item is in stock and is available for purchase.

is EU plug the only on-sale item? i want an US plug. Price difference i see now is around $10. thanks

By gg Jan-03/2016 05:01:02

A

Hi Gg, there are 3 standard plugs of this item - US, EU and UK plug versions. They are available now. Welcome to order! Thank you for your interest in our products.
To know more about plug-types, please refer to http://www.worldstandards.eu/electricity/plugs-and-sockets/

Q

Hi
Will you put 9.34$ on packet to avoid taxa and customs
Thanks in advance

By Jimmy Aug-01/2017 02:08:46

A

Hello Jimmy, Thanks for your inquiry.

Sorry, we cannot declare a lower value on the package.

Q

Hello,
I'm thinking about ordering this product along with a set of batteries, but can you ship them to Saudi Arabia?

By Cullu Jun-06/2017 07:06:35

A

Hello, Cullu

Thank you for the inquiry.

This item can be shipped to Saudi Arabia.

You can check if you are able to place the order successfully with the batteries, if yes than we can ship the items to Saudi Arabia.

Please feel free to contact us if you have additional questions.

Q

Good morning, my name is Rossano, and I live in Italy, because I would be interested in buying the OPUS charger BT-C3100 v2.2, (clearly version 2.2), first I would like to know if there are problems to dispatch in Italy, in particular, there may be additional costs for customs, or if there are additional payments after the purchase in Italy?
I would also ask if I can buy the rechargeable lithium batteries AA and AAA, if there are no problems of shipping and customs for Italy?
The payment, I would do it through paypal.
Thank you.
Best regards.

By Rossano Dec-16/2015 12:12:32

A

Hi Rossano, we can deliver it to Italy. Please add the items to cart and Proceed to Checkout, then fill the detail destination information. You will see the Available Shipping Methods, Estimated Shipping Time and Insurance. The Shipping Cost and Grand Total amount will be displayed for each shipping method. You can pay for order by PayPal and credit card via PayPal. For more information, please refer to http://www.gearbest.com/about/about-us.html According to our experience declaring a lower value on the shipping will usually allow customers to reduce possible import taxes or customs blockages. If you have any specific requirement regarding declaration, please leave us message when you check-out. Thank you for your understanding.

Q

hello sir/madam
will you give tracking number when sending item from china to turkey with Flat Rate Shipping option? thanks.

By umit Oct-27/2015 06:10:45

A

Hi Umit,
For flat rate shipping：By default there is no tracking number as this is the cheapest shipping method. Most of the time we offer it for free.
However we can ugrade your delivery if you purchase the Tracking Number option available in the check out for a small fee.
Thank you for your inquiry.

Q

Hello. Can I order a product from a warehouse in Europe? I need a delivery to Russia.

By Denis Yakovlev Oct-27/2015 11:10:09

A

Hi Denis,
We can ship it from EU warehouse to Russia. Thank you for your inquiry.

Q

Hello. I Am a visitor in canada and i want to order this item. How long do you think will it take that i can have this charger in my hands befor i leave Canada. Thanks for your reply

By Mash Sep-18/2015 03:09:20

A

Hi Mash,
Total Delivery Time = Processing Time + Packaging Time + Shipping Time
We generally require between 3-5 business days to arrange shipment of orders.
The exact delivery time depends on the shipping method you choose.
1) Expedited Shipping: Around 4-7 business days to arrive.
2) Standard Shipping: Between 6-8 business days to be delivered.
3) Flat Rate Shipping: Between 10-25 business days to ship to the destination.
Please check the details in the following link http://www.gearbest.com/about/shipping-methods.html

Q

How much days is the delivery to Russia

By St Jul-02/2015 01:07:01

A

Hi,St! Total Delivery Time = Processing Time + Shipping Time
We will need approximately 3-5 business days to arrange shipment of your order.
It depends on the shipping method you choose.
For small quantity orders,the processing time is 1-3 busiensss days while large quantity order may require a few days more.
1) Flat Rate Shipping: Between 7-25 business days to ship to the destination, by post office.
2) Standard Shipping: Between 6-8 busines days to be delivered, by EMS.
3) Expedited Shipping: Around 3-7 business days to arrive, by DHL/FEDEX/IB.
For more information about shipping http://www.gearbest.com/about/shipping-methods.html

Pros:Charger with many options to check/test batteries Many options for changing charging speeds (lower/higher mAh\'s) Solid machine, well-build Smooth bay-slidersCons:The fan can be a bit noisy when using the charger in the bedroom close to where you are sleeping. Better to place it in a different room, or with some distance from your bed when charging overnight

Cons:The fan can be a bit noisy when using the charger in the bedroom close to where you are sleeping. Better to place it in a different room, or with some distance from your bed when charging overnight

Cons:The fan can be a bit noisy when using the charger in the bedroom close to where you are sleeping. Better to place it in a different room, or with some distance from your bed when charging overnight

Shipping & Payment

Shipping

There are two key factors which will affect the time you receive your items.

1

Item processing time

After confirming your payment, we usually ship products out within 24 business hours. However, sometimes due to large transaction volumes or other order issues, we may require up to 3 working days to process orders. You will receive a notification email as soon as your product(s) have been dispatched.

2

Shipping methods

China Warehouse:

Shipping Type

Country or Region

Arrive within 1-7 Days

Arrive within 8-15 Days

Arrive within 16-30 Days

Arrive within 31-45 Days

Average Time (Days)

Unregistered Air Mail or Registered Air Mail

United States

0.52%

23.78%

69.62%

5.87%

25.63

Spain, United Kingdom, Italy, Germany, France & Portugal

1.58%

35.8%

56.84%

5.57%

26.39

Netherlands, Greece, Poland, Hungary, Slovakia, Czech Republic

5.59%

24.44%

55.84%

13.00%

27

Russia

0%

0.04%

64.94%

30.02%

39.53

Japan, Korea

0%

21.30%

68.80%

9.66%

23

Brazil

0%

0%

23.91%

72.09%

38.6

Turkey

0.06%

61.80%

37.68%

0.45%

23.52

Thailand, Singapore & Malaysia

0%

18.38%

54.27%

25.34%

19.03

Other countries

0.7%

38.79%

47.94%

8.56%

23.57

Priority Line

United States

0.43%

33.18%

65.07%

0.5%

16.43

Spain, United Kingdom, Italy, Germany, France & Portugal

2.55%

18.21%

35.65%

34.27%

26.31

Russia

0%

0%

32.6%

65.4%

36.07

Brazil

0%

0.26%

41.22%

58.17%

36.67

Turkey

0.1%

51.37%

47%

0.47%

14.47

Australia

7.67%

86.60%

5.68%

0%

11

Korea

35.54%

44.45%

19.32%

0%

11.65

Japan

95.80%

2.09%

0%

0%

6.84

Thailand, Singapore & Malaysia

58.96%

41.04%

0%

0%

8.45

Other countries

22.33%

30.8%

27.62%

17.64%

18.65

Expedited Shipping

ALL countries(EMS)

3.8%

46.8%

26%

15%

14.8

ALL countries(DHL)

65.8%

25.75%

3.86%

0.37%

6.72

GW Warehouse: Typically 3-5 days to the UK, 3-7 days to other European countries.

USA Warehouse:Generally, 3-7 days to a USA address.

ES Warehouse:Generally, 2-5 days to the Spain, 3-7 days to the Portugal.

Shipping from warehouse nearest to shipping address is faster. Additional charges may apply.

Note:The above shipping time are calculated by using calendar days. This is a general guide and delays maybe caused force majeure, natural disasters, inclement weather, war, public holidays, and factors outside our control.

Payment

Paypal

Wire transfer

For orders which exceed $1,500,please contact us at support@gearbest.com.Note: please email us the order number,the amount transferred along with currency type,and the exact date of the wire transfer.

3

Western Union

Please contact us at support@gearbest.com for details.Note: please email us the following information after you have paid via Westem Union: · Control Number(10 digits)· The exact amount sent along with the currency· Name of sender.· Address of sender

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Country:

Your Name:

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(please include country code)

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Detailed Inquiry Information:

*Please let us know as much as possible about your inquiry so that we can assist you with your specific needs. We are always happy to help wherever possible.

Hot Sales

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Destination Country:

Available shipping methods:

Please note: the standard and expedited shipping costs are only estimates; the actual shipping price will be shown on the order page.

72 Hour Price Protection Program

At Gearbest we work hard to ensure we can offer our customers high quality products at the lowest possible price. If you purchase a Gearbest product and find that the price has dropped within 72 hours of paying the order, we will refund the difference - no questions asked. Simply contact our Customer Service team at our Support Center with the details. Please note that our 72 hours Price Protection Program does not apply to Flash Deal products.

Price Disclaimer

Prices may fluctuate due to page caches, updates or sales ending; the most up-to-date price takes priority.